In situ surface roughness measurement using a laser scattering method

Laser methods based on an analysis of scattered light for automated, in-process inspection of machined surfaces: A review

“…However, it is possible to measure the displacement in the range ±300 µm. The above mentioned probe has several modifications [22,23]. The instrument has a relatively simple construction.…”

“…Lu and Tian used a similar approach [24]. This has been implemented in an optical measuring head of a similar design [23]. The instrument was used for in-process measurements of surface roughness (Ra parameter) in the range of 0.05 μm to 1.6 μm.…”

“…Schematic diagrams of selected experimental optical systems used during in-process inspection: a) measuring probe proposed by Tay et al[23]; b) hybrid vision system proposed by Tian and Lu[28] …”

Surface roughness inspection in milling operations with photometric stereo and PNN

“…Several studies have been performed to inspect the surface roughness of a part based on image processing. These introduced techniques include light scattering [3][4][5][6], laser speckle [7][8][9], and several types of texture analysis [10,11,12].…”

Development of a laser-based measurement system for evaluation of the scraping workpiece quality

“…Fan et al [18] presented a profile measurement system with a low cost DVD pick-up. Tay et al [19] presented an optical surface measurement system that uses the light scattering method, which comprises a laser diode, a measuring lens, and a linear photodiode array. The resolution of the surface measurement system is 0.01 mm.…”